been outlined on the Harvard Business Review Blog. Fair PWYW integrates PWYW into a feedback/control cycle which tries to create value for both the buyer and seller. It attempts to reflect the customer's dynamic perceptions of value and real willingness to pay - this enables it to optimize co-creation of customer value over the course of the buyer and seller's relationship. See also Co-creation Freemium Honor system Pay what you can Price discrimination Pricing methods Proof-of-payment Sliding scale fees Busking References External links Pay-as-you-wish at Freakonomics Pay-What-You-Want for Musicians at Techdirt Shared Social Responsibility: A Field Experiment in Pay-What-You-Want Pricing and Charitable Giving at Sciencemag.com. When Selling Digital Content, Let the Customer Set the Price at Harvard Business Review Economic systems Pricing